High fidelity ac gate operations of the quantum dot hybrid qubit

Clement H. Wong

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High fidelity ac gate operations of the quantum dot hybrid qubit

Clement H. Wong

Mesoscale and Nanoscale Physics · Submitted 15 Jul 2015

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim We show theoretically that the threshold fidelity can be achieved with ac gate operation of the quantum dot hybrid qubit.

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What the abstract itself states, as probabilities: claims first 0.13 · states limitation 0.45 · human participants 0.02 · controlled comparison 0.04 · randomized assignment 0.01 · states quantitative result 0.13 · compares with prior results 0.42 · mentions code or data availability 0.02.

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arXiv listing abstract v5. Results and the main claim are underlined; show every role.

Semiconductor quantum dots in silicon are promising qubits because of long spin coherence times and their potential for scalability. However, such qubits with complete electrical control and fidelities above the threshold for quantum error correction have not yet been achieved. We show theoretically that the threshold fidelity can be achieved with ac gate operation of the quantum dot hybrid qubit. Formed by three electrons in a double dot, this qubit is electrically controlled, does not require magnetic fields, and runs at GHz gate speeds. We analyze the decoherence caused by 1/f charge noise in this qubit, find the parameter regime for tunnel couplings and detuning that minimize the charge noise dependence in the qubit frequency, and determine the optimal working points for ac gate operations that drive the detuning and tunnel coupling.

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What the classifier reports for each sentence. The number is the probability it gave the label.
#	sentence	role	the authors' own work	states the main conclusion	strength
s0	Semiconductor quantum dots in silicon are promising qubits because of long spin coherence times and their potential for scalability.	background 1.00	0.04	0.02	asserted 0.72
s1	However, such qubits with complete electrical control and fidelities above the threshold for quantum error correction have not yet been achieved.	gap 1.00	0.04	0.03	asserted 1.00
s2	We show theoretically that the threshold fidelity can be achieved with ac gate operation of the quantum dot hybrid qubit.	result 0.62	0.92	0.90	asserted 1.00
s3	Formed by three electrons in a double dot, this qubit is electrically controlled, does not require magnetic fields, and runs at GHz gate speeds.	contribution 0.84	0.41	0.06	asserted 1.00
s4	We analyze the decoherence caused by 1/f charge noise in this qubit, find the parameter regime for tunnel couplings and detuning that minimize the charge noise dependence in the qubit frequency, and determine the optimal working points for ac gate operations that drive the detuning and tunnel coupling.	contribution 0.60	0.95	0.10	asserted 1.00

What kind of paper the classifier reports this is: theoretical result 1.00 · evidence from proof or derivation 0.85.

What was examined, and what was not

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arXiv listing abstract v5

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C citations
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Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper

Original abstract

Semiconductor quantum dots in silicon are promising qubits because of long spin coherence times and their potential for scalability. However, such qubits with complete electrical control and fidelities above the threshold for quantum error correction have not yet been achieved. We show theoretically that the threshold fidelity can be achieved with ac gate operation of the quantum dot hybrid qubit. Formed by three electrons in a double dot, this qubit is electrically controlled, does not require magnetic fields, and runs at GHz gate speeds. We analyze the decoherence caused by 1/f charge noise in this qubit, find the parameter regime for tunnel couplings and detuning that minimize the charge noise dependence in the qubit frequency, and determine the optimal working points for ac gate operations that drive the detuning and tunnel coupling.

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What it cites · 4 sentences without a confident label

Compares with 1 paper

Fig. [ref] a–c compares the qubit energy levels, excitation frequency $_Z/2π$, and the quasistatic dephasing time scale $T_2^*(Z)$ for the optimal tunnel couplings with the ones reported in Ref. [ref] .

High fidelity resonant gating of a silicon based quantum dot hybrid qubit · Optimal static tunnel couplings · 0.99

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